[Dovecot] problems implementing dovecot LDA with Postfix

[Stan Hoeppner]

Per the instructions here http://wiki.dovecot.org/LDA and here
http://wiki.dovecot.org/LDA/Postfix I set

postmaster_address = postmaster at hardwarefreak.com

in /etc/dovecot/dovecot.conf

and

mailbox_command = /usr/lib/dovecot/deliver

in /etc/postfix/main.cf

When I restart dovecot I get this:

[07:17:00][root at greer]/etc/dovecot$ /etc/init.d/dovecot restart
Restarting IMAP/POP3 mail server: dovecotError: Error in configuration file
/etc/dovecot/dovecot.conf line 754: Unknown setting: postmaster_address
Fatal: Invalid configuration in /etc/dovecot/dovecot.conf
 failed!

And after restarting Postfix and sending a test message from a gmail account
I get this in the mail log:

May  9 07:26:09 greer postfix/qmgr[13384]: AEE976C32C:
from=<snugmonster at gmail.com>, size=1628, nrcpt=1 (queue active)
May  9 07:26:09 greer dovecot: deliver(stan): Fatal: postmaster_address
setting not given
May  9 07:26:09 greer postfix/local[13392]: AEE976C32C:
to=<stan at hardwarefreak.com>, relay=local, delay=1.4, delays=1.3/0.03/0/0.04,
dsn=4.3.0, status=deferred (temporary failure)

The server is Debian Lenny 5.0.4 with Postfix 2.5.5 and Dovecot 1.2.11 from
Lenny backports.

Any ideas?  Everything I've found via Google relating to this Dovecot
startup error has to do with people converting old dovecot.conf files to a
new dovecot version.

-- 
Stan